Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by tenure status of the housing. Unidades: Horizontal percentages. ,A heavy burden,A reasonable burden,No burden,Not specified, Total,36,2,58,5,6,0,3, Property,34,6,59,7,5,4,0,3, Lease at market price,45,6,50,1,4,2,0,1, Lease below market price,40,7,54,3,4,8,0,2, Free assignment,28,3,58,5,12,7,0,4, Notas: Fuente: Instituto Nacional de Estadística